Thermo-optical properties measurements in chalcogenide glasses using thermal relaxation and thermal lens methods

• Published in: Journal of non-crystalline solids 2004-11, Vol.348 (Complete), p.108-112
• Main Authors: Lima, S.M., Steimacher, A., Medina, A.N., Baesso, M.L., Petrovich, M.N., Rutt, H.N., Hewak, D.W.
• Format: Article
• Language: English
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Optical properties of bulk materials and thin films; Physics; Thermooptical and photothermal effects
• ISSN: 0022-3093; 1873-4812
• DOI: 10.1016/j.jnoncrysol.2004.08.134

In this work we determine the thermo-optical properties of two chalcogenide glasses (in mol%): 65 Ga2S3; 30 La2S3; 5 La2O3 (Ga:La:S) and 72.5 Ga2S3; 27.5 La2O3 (Ga:La:S:O). The thermal relaxation calorimetry and the thermal lens technique were combined so that the samples specific heat, thermal diffusivity, thermal conductivity, and the temperature coefficient of the optical path length change could be measured. Our results indicate that changes in thermal diffusivity (∼2.7×10−3cm2/s) and conductivity (∼4.8×10−3W/Kcm) observed when La2O3 is added in the glass compounds are less than the error in the data.